This kit comes with double lined plastic multi compartment trays inside a sturdy wooden case which latches closed. On one side, 32 small compartments capable of holding 20 - 30gms of paint in each, and on the opposite side, 18 larger compartments capable of holding around 50 - 60gms of paint. Perfect for storing home made rainbow cakes! Superstar sponges fit perfectly into the large compartments. Entire wooden kit measures 37.5cm x 20.3cm x 5.5cm. Large compartments measure 5.5cm x 5.3cm, and the small are 4.2cm x 4cm. This case also comes with a transparent plastic divider. You can fit three inserts stacked up in this case.